998658495567 has 48 divisors (see below), whose sum is σ = 1478593459200. Its totient is φ = 649308441600.

The previous prime is 998658495557. The next prime is 998658495599. The reversal of 998658495567 is 765594856899.

998658495567 is a `hidden beast` number, since 9 + 9 + 8 + 6 + 5 + 8 + 49 + 5 + 567 = 666.

998658495567 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 998658495567 - 2⁴ = 998658495551 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998658495557) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 154851559 + ... + 154858007.

It is an arithmetic number, because the mean of its divisors is an integer number (30804030400).

Almost surely, 2^998658495567 is an apocalyptic number.

998658495567 is a deficient number, since it is larger than the sum of its proper divisors (479934963633).

998658495567 is a wasteful number, since it uses less digits than its factorization.

998658495567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8864 (or 8861 counting only the distinct ones).

The product of its digits is 5878656000, while the sum is 81.

The spelling of 998658495567 in words is "nine hundred ninety-eight billion, six hundred fifty-eight million, four hundred ninety-five thousand, five hundred sixty-seven".